Iridology is the practice of looking at the patterns, shapes and colors surrounding the iris of your eye to determine health conditions and impairments of the body. I came across a really interesting video of a girl (Adelle Ramcharan) on Youtube describing how Iridology changed her life.
One of the very interesting things she mentions is that her practitioner determined she has had anxiety and that it was passed down from a previous generation through her DNA. Are emotions inherited in our DNA?
Adelle goes on to say that there is a field in science called epigenetics, which states in simple terms that you can change your genes. At least the emotional ones.